[38.08] A Study of 1- and 2-moment Closures for Supernova Neutrino Transport

T.R. Young, A. Burrows, P. Pinto (University of Arizona)

We present results of 1-moment (flux-limited diffusion) and
2-moment closures for static neutrino atmospheres in the
cores of massive stars. The code used in all calculations is
an implicit, multi-group, spherical neutrino transport
algorithm. Given these various closures, we calculate
emergent spectra, luminosities, and net heating rates. We
also compare the results using the various closures with
those using a more precise technique to gauge the accuracy
of such approximations.